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US 2023/0411722 A1Published application
Lithium-rich compositions
AssigneeRedwood Materials, Inc.
InventorsJay T. SAUNDERS, II, Jeffrey B. STRAUBEL
Life of this patent
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Abstract
The present disclosure relates to the production of lithium-enriched compositions from lithium-ion batteries, and the processing of those compositions for the economic recovery of lithium compounds useful for commercial and industrial applications.
Claims28
A lithium concentrate comprising:
- about 13% to about 30% Li2O;
- about 25% to about 55% SiO2;
- and
- about 25% to about 55% Al2O3.
1 more element
A process comprising:
- feeding lithium batteries, battery scrap, or battery components into a furnace;
- blowing or injecting an oxygen-containing gas into the furnace to produce a metal phase and a lithium concentrate phase, wherein heating is autothermal;
- and
- separating the metal phase from the lithium concentrate phase.
1 more element
A process for extracting lithium from a lithium concentrate, comprising:
- reducing the size of the lithium concentrate;
- acidifying a slurry of the size-reduced lithium concentrate in water by addition of at least one acid;
- neutralizing the acidic slurry to a pH of about 7;
- and
- filtering the solids from the neutralized slurry, thereby obtaining a clarified lithium-enriched solution of a lithium salt.
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Dependencies are inferred from the claim text.